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operating system>
Sun Microsystems, Inc.'s version of the
Unix operating system. As well as the core operating system, Solaris inludes networking software, the
Java Virtual Machine, the
CDE/Desktop that includes an X11-based windowing environment and
graphical user interface.
Sun claim that Solaris is not just an operating system but an "operating environment".
Solaris 1.x was a retroactive (marketing?) name for
SunOS 4.1.x (where x>=1).
Solaris 2.x (which is the first version most people call "Solaris") includes SunOS5.x, which is an SVR4-derived Unix,
OpenWindows 3.x, and tooltalk.
Version 2.7 ("Solaris 7") was around in 1999-03-02. Version 2.8 was released in June 2000. Latest version: 9, as of 2002-07-15.
http://sun.com/solaris/.